\begin{tikzpicture}
    \tkzDefPoints{0/0/A,  2.5/0/B,  1/0/C, 3.5/0/D, 0.8/2/M,  1.8/2/N}

    \tkzDrawPolygon(A,B,M)
    \tkzDrawPolygon(C,D,N)
    \tkzLabelPoints[above](M,N)
    \tkzLabelPoints[below](A,C,B,D)
\end{tikzpicture}

